The purpose of this report is to explore the content-related validity evidence supporting the English language arts (ELA) components of the "ETS"® National Observational Teaching Exam (NOTE) assessment series, a kindergarten through 6th-grade teacher licensure assessment. To establish the content knowledge required for the effective teaching of ELA in elementary school, we (a) identified content knowledge categories through the use of an expert panel and (b) surveyed a sample of 279 educators to verify that this body of content knowledge is indeed necessary and reasonable for the effective practice of beginning elementary school teachers teaching ELA. We report information regarding the importance and relevance of ELA content knowledge areas for both elementary school teachers and faculty members who prepare elementary school teachers. Implications of this work for the ELA components of the NOTE assessment series are discussed. English Language Arts (ELA) Content Knowledge for Teaching (CKT) Areas are appended. [Some of the content that appears in this report also is used in a companion report, "Investigating the Relevance and Importance of Mathematical Content Knowledge Areas for Beginning Elementary School Teachers. Research Memorandum No. RM-16-10" (ED570636).]